The task of modern education is to shape the specialist of the future. In addition to transferring the necessary knowledge, skills and abilities, the organizer of the educational process has an important goal of forming the professional personality of the future specialist. The composition of modern educational technologies should, in addition to the usual types of work built on the system of lectures and seminars, include business games that are more conducive to the development of professional competencies. The authors of this article highlight the Moot Court business game as fundamental in the development of professional competencies of international lawyers and diplomats, as well as the formation of soft skills necessary for the implementation of professional activities. Thanks to the Moot Court competition, the participant can feel like a player of a real professional space, show their talents and apply the necessary knowledge to solve the tasks set in the game. According to the authors, such professional student competitions should become part of the educational professional environment of universities. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.